Method for determining total number of bits of feedback response information and related product

ABSTRACT

A method for determining the length of feedback response information and a related product. The method comprises the following steps: a terminal receives configuration signaling sent by a network side device, the configuration signaling comprising: indicating the maximum transmission delay of feedback response information; the terminal dynamically determines a hybrid automatic repeat request feedback time sequence; the terminal determines the total number of bits of a feedback response message to be transmitted according to the maximum transmission delay; the terminal sends the feedback response message to be transmitted with the total number of bits to the network side device. The technical solution provided by the present invention has the advantage of supporting the multiplex transmission of feedback response information in one transmission time unit in a new radio system.

CROSS-REFERENCE TO RELATED APPLICATIONS

The application is a continuation of U.S. application Ser. No.16/619,431 filed on Dec. 4, 2019, which is a national phase applicationof International Patent Application No. PCT/CN2018/085678 filed on May4, 2018, and claims priority to PCT Application No. PCT/CN2017/096656filed on Aug. 9, 2017 and entitled “Method for Determining FeedbackResponse Information and Related Product” and to PCT Application No.PCT/2018/081785 filed on Apr. 3, 2018 and entitled “Method forDetermining Length of Feedback Response Information and RelatedProduct”. The contents of these applications are hereby incorporated byreference in their entireties.

TECHNICAL FIELD

The disclosure relates to the field of communication technologies, andmore particularly to a method for determining a total number of bits offeedback response information and related product.

BACKGROUND

Hybrid Automatic Repeat Request (HARQ) integrates storage,retransmission request and merging demodulation. A receiving party, incase of a failure in decoding, stores received data and requests asending party to retransmit data, and the receiving party mergesretransmitted data and the previously received data for decoding.

A New Radio (NR) system supports dynamic indication of HARQ timing. In atechnical solution of HARQ timing, a length (i.e., the number of bits)of an Acknowledgement (ACK)/Negative Acknowledgement (NACK) fed backwithin a transmission time unit (for example, a time slot) cannot bedetermined, so that an related NR system cannot support multiplexingtransmission of an ACK/NACK.

SUMMARY

Implementations of the disclosure provide a method for determining atotal number of bits of feedback response information and relatedproduct, which may implement multiplexing transmission of an ACK/NACK inan NR system.

According to a first aspect, the implementations of the disclosureprovide a method for determining a total number of bits of feedbackresponse information, which may include the following operations.

A terminal receives configuration signaling transmitted by a networkdevice, here, the configuration signaling includes an indication about amaximum transmission delay for feedback response information.

The terminal determines a total number of bits of feedback responseinformation to be transmitted according to the maximum transmissiondelay and a minimum transmission delay.

In an implementation, after the operation that the terminal determinesthe total number of bits of the feedback response information to betransmitted according to the maximum transmission delay and the minimumtransmission delay, the method may further include the followingoperation.

The terminal transmits to the network device the feedback responseinformation to be transmitted with the total number of bits.

In an implementation, a time unit, which is used by the terminal totransmit to the network device the feedback response information to betransmitted with the total number of bits, may be determined by theterminal according to dynamically determined HARQ feedback timing.

In an implementation, the operation that the terminal determines thetotal number of bits of the feedback response information to betransmitted according to the maximum transmission delay and the minimumtransmission delay may include the following operation.

The terminal determines the total number of bits of the feedbackresponse information to be transmitted according to a difference betweenthe maximum transmission delay and the minimum transmission delay.

In an implementation, the operation that the terminal determines thetotal number of bits of the feedback response information to betransmitted according to the maximum transmission delay and the minimumtransmission delay may include the following operation.

The total number of bits N=C*(T_(max)−T_(min)).

Here, T_(max) may be the maximum transmission delay, T_(min) may be anonnegative integer less than T_(max), and C may be a positive integer.

In an implementation, T_(min) may be the minimum transmission delay fortransmission of the feedback response information by the terminal, orT_(min) may be a parameter configured by the network device.

In an implementation, C may be a maximum number of bits of feedbackresponse information corresponding to a Physical Downlink Shared Channel(PDSCH), or C may be a set constant, or C may be a parameter configuredby the network device.

In an implementation, the maximum number of bits of the feedbackresponse information corresponding to the PDSCH may be: a maximum numberof Transport Blocks (TBs) carried in the PDSCH; or a maximum number ofCode Block (CB) groups carried in the PDSCH.

In an implementation, the operation that the terminal transmits to thenetwork device the feedback response information to be transmitted withthe total number of bits may include the following operations.

The terminal transmits the feedback response information on which ajoint encoding has been performed; or the terminal transmits thefeedback response information through a physical channel.

According to a second aspect, implementations of the disclosure providea device for determining a total number of bits of feedback responseinformation, which may include a processing unit and a transceiver unitconnected with the processing unit.

The transceiver unit may be configured to receive configurationsignaling transmitted by a network device, here, the configurationsignaling includes an indication about a maximum transmission delay forfeedback response information.

The processing unit may be configured to determine a total number ofbits of feedback response information to be transmitted according to themaximum transmission delay and a minimum transmission delay.

In an implementation, the transceiver unit may further be configured totransmit, by a terminal, to the network device the feedback responseinformation to be transmitted with the total number of bits.

In an implementation, a time unit used by the terminal to transmit tothe network device the feedback response information to be transmittedwith the total number of bits may be determined by the terminalaccording to dynamically determined HARQ feedback timing.

In an implementation, the processing unit may specifically be configuredto determine the total number of bits of the feedback responseinformation to be transmitted according to a difference between themaximum transmission delay and the minimum transmission delay.

In an implementation, the processing unit may specifically be configuredto determine the total number of bits of the feedback responseinformation to be transmitted according to the maximum transmissiondelay and the minimum transmission delay, the total number of bitsN=C*(T_(max)−T_(min)).

Here, T_(max) may be the maximum transmission delay, T_(min) may be anonnegative integer less than T_(max), and C may be a positive integer.

In an implementation, T_(min) may be the minimum transmission delay fortransmission of the feedback response information by the terminal, orT_(min) may be a parameter configured by the network device.

In an implementation, C may be a maximum number of bits of feedbackresponse information corresponding to a PDSCH, or C may be a setconstant, or C may be a parameter configured by the network device.

In an implementation, the maximum number of bits of the feedbackresponse information corresponding to the PDSCH may be: a maximum numberof TBs carried in the PDSCH; or a maximum number of CB groups carried inthe PDSCH.

In an implementation, the transceiver unit may specifically beconfigured to transmit the feedback response information on which ajoint encoding has been performed. Or the transceiver unit mayspecifically be configured to transmit the feedback response informationthrough a physical channel.

According to a third aspect, implementations of the disclosure provide amethod for determining a total number of bits of feedback responseinformation, which may include the following operations.

A network device transmits configuration signaling to a terminal, here,the configuration signaling includes an indication about a maximumtransmission delay for feedback response information.

The network device determines a total number of bits of feedbackresponse information to be transmitted according to the maximumtransmission delay and a minimum transmission delay.

In an implementation, after the operation that the network devicedetermines the total number of bits of the feedback response informationto be transmitted according to the maximum transmission delay and theminimum transmission delay, the method may further include the followingoperation.

The network device receives from the terminal the feedback responseinformation to be transmitted with the total number of bits.

In an implementation, a time unit for the feedback response informationto be transmitted with the total number of bits, which information isreceived by the network device, may be determined by the terminalaccording to dynamically determined HARQ feedback timing.

In an implementation, the operation that the network device determinesthe total number of bits of the feedback response information to betransmitted according to the maximum transmission delay and the minimumtransmission delay may include the following operation.

The network device determines the total number of bits of the feedbackresponse information to be transmitted according to a difference betweenthe maximum transmission delay and the minimum transmission delay.

In an implementation, the operation that the network device determinesthe total number of bits of the feedback response information to betransmitted according to the maximum transmission delay and the minimumtransmission delay may include the following operation.

The total number of bits N=C*(T_(max)−T_(min)).

Here, T_(max) may be the maximum transmission delay, T_(min) may be anonnegative integer less than T_(max), and C may be a positive integer.

In an implementation, T_(min) may be the minimum transmission delay forfeedback response information transmission of the terminal. Or T_(min)may be a parameter configured by the network device.

In an implementation, C may be a maximum number of bits of feedbackresponse information corresponding to a PDSCH. Or C may be a setconstant. Or C may be a parameter configured by the network device.

In an implementation, the maximum number of bits of the feedbackresponse information corresponding to the PDSCH may be: a maximum numberof TBs carried in the PDSCH; or a maximum number of CB groups carried inthe PDSCH.

In an implementation, the operation that the network device receivesfrom the terminal the feedback response information to be transmittedwith the total number of bits may include the following operations.

The network device receives from the terminal the feedback responseinformation on which a joint encoding has been performed.

Or the network device receives the feedback response information that istransmitted by the terminal through a physical channel.

According to a fourth aspect, implementations of the disclosure providea device for determining a total number of bits of feedback responseinformation, which may include a processing unit and a transceiver unitconnected with the processing unit.

The transceiver unit may be configured to transmit configurationsignaling to a terminal, here, the configuration signaling includes anindication about a maximum transmission delay for feedback responseinformation.

The processing unit may be configured to determine a total number ofbits of feedback response information to be transmitted according to themaximum transmission delay and a minimum transmission delay.

According to a fifth aspect, implementations of the disclosure provide aterminal, which may include one or more processors, a memory, atransceiver and one or more programs. The one or more programs may bestored in the memory and configured to be executed by the one or moreprocessors, and the programs may include instructions configured toexecute the operations in the method provided in the first aspect.

According to a sixth aspect, implementations of the disclosure provide acomputer-readable storage medium, which may store a computer program forelectronic data exchange, here, the computer program enables a computerto execute the method provided in the first aspect.

According to a seventh aspect, implementations of the disclosure providea computer program product, which may include a non-transitorycomputer-readable storage medium storing a computer program, thecomputer program is operable to enable a computer to execute the methodprovided in the first aspect.

According to an eighth aspect, implementations of the disclosure providea network device, which may include one or more processors, a memory, atransceiver and one or more programs. The one or more programs may bestored in the memory and configured to be executed by the one or moreprocessors, and the programs may include instructions configured toexecute the operations in the method provided in the third aspect.

According to a ninth aspect, implementations of the disclosure provide acomputer-readable storage medium, which may store a computer program forelectronic data exchange, here, the computer program enables a computerto execute the method provided in the third aspect

According to a tenth aspect, implementations of the disclosure provide acomputer program product, which may include a non-transitorycomputer-readable storage medium storing a computer program, thecomputer program is operable to enable a computer to execute the methodprovided in the third aspect

From the above, in the implementations of the disclosure, the terminalreceives a maximum transmission delay transmitted by a base station,calculates a length of the feedback response information to betransmitted according to the maximum transmission delay and transmits tothe base station the feedback response information with the length, sothat multiplexing transmission of an ACK/NACK in a transmission timeunit may be supported by an NR system, and the advantage of supportingmultiplexing transmission of the feedback response information in the NRsystem is achieved.

BRIEF DESCRIPTION OF DRAWINGS

The drawings used for descriptions about the implementations or relatedarts will be simply introduced below.

FIG. 1 is a structure diagram of an exemplary communication system.

FIG. 2 is a structure diagram of an exemplary NR communication system.

FIG. 2A is a diagram of exemplary transmission time units.

FIG. 3 is a flowchart of a method for determining a length of feedbackresponse information according to an implementation of the disclosure.

FIG. 3A is a diagram of transmission time units according to animplementation of the disclosure.

FIG. 3B is a flowchart of a method for determining a length of feedbackresponse information according to another implementation of thedisclosure.

FIG. 3C is a flowchart of another method for determining a length offeedback response information according to yet another implementation ofthe disclosure.

FIG. 4 is a block diagram of functional units of a terminal according toan implementation of the disclosure.

FIG. 4A is a block diagram of functional units of a network deviceaccording to an implementation of the disclosure.

FIG. 5 is a hardware structure diagram of a terminal according to animplementation of the disclosure.

FIG. 5A is a hardware structure diagram of a network device according toan implementation of the disclosure.

FIG. 6 is a structure diagram of another terminal according to animplementation of the disclosure.

DETAILED DESCRIPTION

The technical solutions in the implementations of the disclosure will bedescribed below in combination with the drawings.

Referring to FIG. 1, FIG. 1 is a possible network architecture of anexemplary communication system according to an implementation of thedisclosure. The exemplary communication system may be a 5th-Generation(5G) NR communication system, and specifically includes a network deviceand a terminal. When the terminal accesses a mobile communicationnetwork provided by the network device, the terminal may establish acommunication connection with the network device through a radio link.Such a communication connection manner may be a single-connection manneror a dual-connection manner or a multi-connection manner. When thecommunication connection manner is the single-connection manner, thenetwork device may be a Long Term Evolution (LTE) base station or an NRNode B (NR-NB) (also called a gNB). When the communication manner is thedual-connection manner (which may specifically be implemented by aCarrier Aggregation (CA) technology or implemented by multiple networkdevices) and the terminal is connected with multiple network devices,the multiple network devices may include a Master Cell Group (MCG) and aSecondary Cell Group (SCG), data backhaul is performed between the cellgroups through backhaul links, the MCG may be an NR base station andeach SCGs may be an NR base station.

In the implementations of the disclosure, terms “network” and “system”are usually used alternately and meanings of the terms may be understoodby those skilled in the art. A terminal involved in the implementationsof the disclosure may include a handheld device with wirelesscommunication functions, a vehicle-mounted device, a wearable device, acomputing device or other processing devices connected to a wirelessmodem, as well as various forms of User Equipment (UE), Mobile Station(MS), terminal device and the like. For convenient description, thedevices mentioned above are collectively referred to as terminals.

Referring to FIG. 2, FIG. 2 is a structure diagram of a 5G NR network.As illustrated in FIG. 2, there may be one or more TransmissionReception Points (TRPs) under an NR-NB, and there may be one or moreterminals within a range of the one or more TRPs. In an NR systemillustrated in FIG. 2, for Downlink (DL) data, a terminal needs to feedback to the gNB through HARQ whether the DL data is successfullyreceived. That is, the terminal needs to feed back a HARQ ACK/NACK tothe gNB. In the NR system, HARQ timing for ACK/NACK feedback informationfor data (mainly the DL data) may be dynamically indicated by the gNB,in the following, a transmission time unit is, for example, a slot.Referring to FIG. 2A, FIG. 2A is a diagram of transmission time unitsfor HARQ timing in an NR system. Here, there may be made such ahypothesis that the HARQ timing is indicated in a slot n. As illustratedin FIG. 2A, there is made such a hypothesis that the HARQ timing may befive slots, and in the five slots, the slot n is used to carry DL datafor DL transmission, the slot n+1 is used to carry Uplink (UL) data forUL transmission, the slot n+2 is used to carry DL data, the slot n+3 isused to carry DL data, the slot n+4 is empty and the slot n+5 is a slotthrough which the terminal feeds back an ACK/NACK to the gNB. Since boththe slot n+2 and the slot n+3 are used to carry the DL data, theACK/NACK corresponding to the slot n+2 and the ACK/NACK corresponding tothe slot n+3 are also needed to be fed back. For example, if the gNBdynamically indicates that HARQ timing for the ACK/NACK corresponding tothe slot n+2 is three slots and HARQ timing for the ACK/NACKcorresponding to the slot n+3 is two slots, then for the slot n+5, thereare ACK/NACKs for three slots, that is, multiplexing transmission of theACKs/NACKs for the three slots are performed in the slot n+5. In the NRsystem illustrated in FIG. 2, the terminal cannot implement multiplexingtransmission of the ACKs/NACKs for the three slots, in the slot n+5.

Referring to FIG. 3, FIG. 3 illustrates a method for determining alength of feedback response information according to an implementationof the disclosure. The method is performed by a terminal. As illustratedin FIG. 3, the method includes the following operations.

In S301, the terminal receives configuration signaling transmitted by anetwork device (for example, a base station). The configurationsignaling may include an indication about a maximum transmission delayfor feedback response information.

The configuration signaling in S301 may be DL control signaling forscheduling a PDSCH transmission. Specifically, the maximum transmissiondelay may be indicated in a DL grant for scheduling the PDSCH. Here, atransmission time unit is, for example, a slot. There is made such ahypothesis that a first transmission time unit in which theconfiguration signaling is received is a slot n, and the maximumtransmission delay may be the number of slots. Specifically, the maximumtransmission delay may be, for example, k1, and then k1 is indicated ina DL grant of the slot n for scheduling the PDSCH.

In S302, the terminal dynamically determines HARQ feedback timing.

An implementation method for S302 may specifically be as follows. Theterminal parses the configuration signaling to obtain the maximumtransmission delay, a transmission time unit obtained after delaying themaximum transmission delay from the first transmission time unit inwhich the configuration signaling is received is namely a transmissiontime unit for HARQ feedback response information. Here, the transmissiontime unit is also, for example, a slot. If the configuration signalingis carried in a slot n for transmission and the maximum transmissiondelay corresponding to the configuration signaling is k1, the determinedHARQ feedback timing is k1, and the transmission time unit for the HARQfeedback response information may be slot n+k1.

In S303, the terminal determines a length (i.e., a total number of bits)of feedback response information to be transmitted according to themaximum transmission delay.

In an implementation, the terminal determines the total number of bitsof the feedback response information according to the maximumtransmission delay and a minimum transmission delay.

In an implementation, the terminal determines the total number of bitsof the feedback response information to be transmitted according to adifference between the maximum transmission delay and the minimumtransmission delay.

In an implementation, the terminal determines the total number of bitsof the feedback response information to be transmitted according to themaximum transmission delay, the minimum transmission delay andM_(non-DL), here, M_(non-DL) is a value less than the maximumtransmission delay.

In an implementation, the terminal determines the total number of bitsof the feedback response information to be transmitted according to avalue obtained by subtracting the minimum transmission delay andM_(non-DL) from the maximum transmission delay, here, M_(non-DL) is avalue less than the maximum transmission delay.

In S304, the terminal transmits a message containing the feedbackresponse information with the determined length of the feedback responseinformation to be transmitted.

An implementation method for S304 may specifically be as follows.

The terminal transmits the feedback response information on which ajoint encoding has been performed.

Or the terminal transmits the feedback response information through aphysical channel.

According to the technical solution provided by the implementationillustrated in FIG. 3, a base station, when scheduling a PDSCHtransmission, indicates the maximum transmission delay in a DL grant ofthe first transmission time unit for scheduling the PDSCH, and theterminal, after receiving the first transmission time unit, acquires themaximum transmission delay, calculates the length of the HARQ feedbackresponse information according to the maximum transmission delay, andtransmits the HARQ feedback response information with the length to thebase station, so that multiplexing transmission of an ACK/NACK in atransmission time unit is supported in an NR system.

A technical effect achieved by the implementation will be describedbelow with an example. The transmission time unit illustrated in FIG. 2Ais transmitted in the NR illustrated in FIG. 2. Herein, there is madesuch a hypothesis that each transmission time unit includes two TBs. Ifthe terminal successfully receives the slot n and the slot n+2 and theterminal does not receive the slot n+3, for example, the terminal doesnot successfully receive the data in the slot n+3, a responsecorresponding to the slot n+3 is not fed back, so that the terminal doesnot carry, in the slot n+5, HARQ feedback response informationcorresponding to the slot n+3, and the feedback response informationcarried by the terminal in the slot n+5 may be 1111. The base stationmay not recognize, according to the 1111, that the terminal does notreceive the slot n+2 or the slot n+3, and thus the base station may notaccurately obtain the HARQ feedback response information of the terminalfor subsequent operations, for example, data retransmission cannot beperformed according to the HARQ feedback response information. Accordingto the technical solution illustrated in FIG. 3, the terminal receives,in the slot n, configuration signaling, here, the configurationsignaling includes the maximum transmission delay which is 5 slots, theterminal determines according to the maximum transmission delay that thetotal number of bits of the HARQ feedback response information is 6 (thespecific method for determining the total number of bits may refer tothe following descriptions and will not be elaborated herein), and theterminal transmits, in the slot n+5, the 6-bit HARQ feedback responseinformation and may specifically transmit 111100. The base station mayknow according to allocation of slots for DL data that the slot n andthe slot n+2 are successfully transmitted and the slot n+3 is failed tobe transmitted, and thereby achieving the advantage that multiplexingtransmission of an ACK/NACK in a transmission time unit is supported inthe NR system.

In an implementation, an implementation method for S303 may specificallybe as follows.

The length, i.e., the total number of bits N, of the feedback responseinformation is calculated according to the following formula (1).

N=C*(T _(max) −T _(max))   (1)

Here, C may be a positive integer, T_(max) may be the maximumtransmission delay, and T_(min) may be a nonnegative integer not greaterthan T_(max).

Specifically, T_(min) may be the minimum transmission delay fortransmission of the feedback response information by the terminal. Ofcourse, T_(min) may also be a parameter configured by the networkdevice, and the parameter may be a fixed value. Of course, during apractical application, a value of T_(min) may also be carried in theconfiguration signaling.

C may be a maximum number of bits of feedback response informationcorresponding to a PDSCH. Or C may be a set constant (i.e., a valuespecified in a protocol or a value predetermined by a manufacturer). OrC may be a parameter configured by the network device.

The maximum number of bits of the feedback response informationcorresponding to the PDSCH may specifically be: a maximum number of TBscarried in the PDSCH; or a maximum number of CB groups carried in thePDSCH.

For example, the maximum number of the TBs carried in a slot for a PDSCHmay be 2 (the number is only for exemplary description and a specificvalue of the number is not limited in the disclosure), this does notmean that each slot includes two TBs. In a practical applicationscenario, the slot may include one TB or no TB (for example, the slotn+4 illustrated in FIG. 2A). The number of the CB groups carried in aslot for a PDSCH may be 4 (the number is only for exemplary descriptionand a specific value of the number is not limited in the disclosure),and similarly, this also does not mean that each slot includes four CBgroups. A method for determining a value of N will be described belowwith an exemplary. Referring to FIG. 3A, the configuration signaling maybe carried in the slot n, the maximum transmission delay in theconfiguration signaling is 4 slots, and the minimum transmission delayin the configuration signaling is 2 slots. There is made such ahypothesis that a total number of basic units for the feedback responseinformation in each slot is two. Here, a basic unit for the feedbackresponse information is, for example, a TB. Of course, during apractical application, the basic unit for the feedback responseinformation may also be a CB group, here, the CB group includes at leastone CB. The value is determined to be 4 (bits) according to N=2*(4−2)=4calculated by using the formula (1).

The above technical solution does not distinguish whether the feedbackresponse information between T_(max) and T_(min) is needed to be fedback to the base station. As illustrated in FIG. 3A, the slot n+1 may beused to carry UL data, and for the slot n+1, no feedback responseinformation is needed to be transmitted to the base station. In thetechnical solution, the feedback response information corresponding tothe slot n+1 may be filled with a specific numerical value (for example,1 or 0), and the base station only needs to identify the feedbackresponse information corresponding to the slot n and the slot n+2, andmay discard or not process the feedback response informationcorresponding to the slot n+1.

In an implementation, the implementation method for S303 mayspecifically be as follows.

The length, i.e., the total number of bits N, of the feedback responseinformation is calculated according to the following formula (2).

N=C*(T _(max) −T _(min) −M _(non-DL))   (2)

Here, T_(min) and M_(non-DL) may be each a nonnegative integer and N isa nonnegative value, and meanings of C and T_(max) may refer to thedescriptions in the formula (1).

In an implementation, M_(non-DL) may specifically be: the number of allfirst-type time units between a transmission time unit Y−T_(max) and atransmission time unit Y−T_(min), here, a transmission time unit Y is atransmission time unit for transmission of the feedback responseinformation.

The first-type time unit may specifically include, but not limited to,one or any combination of: a UL time unit, a time unit in which nophysical shared channel is transmitted by the terminal and a time unitin which no DL control signaling is monitored by the terminal.

In the implementation of the disclosure, in addition to determining thelength of the feedback response information by the formula (1) and theformula (2), another implementation manner may also be adopted todetermine the length of the feedback response information according tothe maximum transmission delay and the minimum transmission delay, oranother implementation manner is adopted to determine the length of thefeedback response information according to the maximum transmissiondelay, the minimum transmission delay and M_(non-DL). For simplicity,elaborations are omitted herein.

A method for determining a value of N will be described below with anexample. Referring to FIG. 3A, the configuration signaling may becarried in the slot n, the maximum transmission delay in theconfiguration signaling is four slots, the minimum transmission delay inthe configuration signaling is 2 slots, and a UL time unit between aslot Y−4 and a slot Y−1 is the slot n+1, so M_(non-DL)=1. There is madesuch a hypothesis that the total number of the basic units for thefeedback response information in each slot is 2. Herein, a basic unitfor the feedback response information is, for example, a TB. Of course,during a practical application, the basic unit for the feedback responseinformation may also be a CB group, here, the CB group includes at leastone CB. The value is determined to be 2 (bits) according toN=2*(4−2−1)=2 calculated by using the formula (2).

The above technical solution distinguishes whether the feedback responseinformation between T_(max) and T_(min), is needed to be fed back to thebase station. As illustrated in FIG. 3A, the slot n+1 may be used carryUL data, and for the slot n+1, no feedback response information isneeded to be transmitted to the base station. According to the technicalsolution, no information is fed back, for the slot n+1, in the feedbackresponse information.

Referring to FIG. 3B, FIG. 3B illustrates a method for determining alength of feedback response information according to a specificimplementation mode of the disclosure. A network device in theimplementation is, for example, a base station. The method is performedbetween a terminal and base station illustrated in FIG. 1. Transmissiontime units between the terminal and the base station are illustrated inFIG. 3A. As illustrated in FIG. 3B, the method includes the followingoperations.

In S301B, the base station transmits configuration signaling to theterminal in a slot n, here, the configuration signaling includes anindication about a maximum transmission delay (which is 4 slots) forfeedback response information.

In S302B, the terminal acquires the maximum transmission delay in theconfiguration signaling and dynamically determines HARQ feedback timingto be four slots.

In S303B, the terminal determines a total number of bits N=2*(4−2−1)=2of feedback response information to be transmitted according to theformula (2).

In S304B, the base station determines the total number of bitsN=2*(4−2−1)=2 of the feedback response information to be transmittedaccording to the formula (2).

In S305B, the terminal transmits the 2-bit feedback response informationto the base station in a slot n+4. According to the technical solutionof the disclosure, the terminal calculates the total number of bits ofthe feedback response information and then transmits the feedbackresponse information with the total number of bits to the base station,thereby achieving, in the slot n+4, multiplexing transmission offeedback response information for the slot n and slot n+2.

Referring to FIG. 3C, FIG. 3C illustrates another method for determininga length of feedback response information. The method is performed by anetwork device, and the network device may be a base station illustratedin FIG. 1 or FIG. 2. As illustrated in FIG. 3C, the method includes thefollowing operations.

In S301C, the network device transmits configuration signaling to aterminal, here, the configuration signaling includes an indication abouta maximum transmission delay for feedback response information.

In S302C, the network device determines HARQ feedback timing dynamicallydetermined by that the terminal.

In S303C, the network device determines a total number of bits offeedback response information to be transmitted according to the maximumtransmission delay.

In an implementation, the network device determines the total number ofbits of the feedback response information to be transmitted according tothe maximum transmission delay and a minimum transmission delay.

In an implementation, the network device determines the total number ofbits of the feedback response information to be transmitted according toa difference between the maximum transmission delay and the minimumtransmission delay.

In an implementation, the network device determines the total number ofbits of the feedback response information to be transmitted according tothe maximum transmission delay, the minimum transmission delay andM_(non-DL), here, M_(non-DL) is a value less than the maximumtransmission delay.

In an implementation, the network device determines the total number ofbits of the feedback response information to be transmitted according toa value obtained by subtracting the minimum transmission delay andM_(non-DL) from the maximum transmission delay, here, M_(non-DL) is avalue less than the maximum transmission delay.

In S304C, the network device receives from the terminal the feedbackresponse information to be transmitted with the total number of bits.

The method of the implementation illustrated in FIG. 3C supportsimplementation of the method of the implementation illustrated in FIG.3, and thus has the advantage that multiplexing transmission of anACK/NACK in a transmission time unit is supported in an NR system.

In an optional solution, the total number of bits N=C*(T_(max)−T_(min)).

Here, T_(max) is the maximum transmission delay, T_(min) is anonnegative integer less than T_(max), and C is a positive integer.

In another optional solution, the total number of bitsN=C*(T_(max)−T_(min)−M_(non-DL)).

Here, T_(max) is the maximum transmission delay, T_(min) and M_(non-DL)are each a nonnegative integer less than T_(max), and C is a positiveinteger.

In an implementation, in the optional solution or the another optionalsolution, T_(min) is the maximum transmission delay for transmission offeedback response information by the terminal. Or T_(min) is a parameterconfigured by the network device.

In an implementation, in the optional solution or the another optionalsolution, C is a maximum number of bits of feedback response informationcorresponding to a PDSCH. Or C is a set constant. Or C is a parameterconfigured by the network device.

In an implementation, in the another optional solution, M_(non-DL) isthe number of all first-type time units between a transmission time unitY−T_(max) and a transmission time unit Y−T_(min), here, a transmissiontime unit Y is a time unit for transmission of the feedback responseinformation to be transmitted.

In an implementation, the first-type time unit includes one or anycombination of: a UL time unit, a time unit in which the terminal doesnot transmit a physical shared channel, and a time unit in which theterminal does not monitor DL control signaling.

In an implementation, the maximum number of bits of the feedbackresponse information corresponding to the PDSCH is: a maximum number ofTBs carried in the PDSCH; or a maximum number of CB groups carried inthe PDSCH.

In an implementation, the operation that the network device receivesfrom the terminal the feedback response information to be transmittedwith the total number of bits may include the following operations.

The network device receives from the terminal the feedback responseinformation on which a joint encoding has been performed.

Or the network device receives the feedback response information that istransmitted by the terminal through a physical channel.

Referring to FIG. 4, FIG. 4 illustrates a device for determining alength of feedback response information. The device for determining thelength of the feedback response information is configured in a terminal.Detailed solutions and technical effects in the implementationillustrated in FIG. 4 may refer to descriptions in the implementationillustrated in FIG. 3 or FIG. 3B. The terminal includes a processingunit 401 and a transceiver unit 402 connected with the processing unit401.

The transceiver unit 402 is configured to receive configurationsignaling transmitted by a network device, here, the configurationsignaling includes an indication about a maximum transmission delay forfeedback response information.

The processing unit 401 is configured to dynamically determine HARQfeedback timing and determine a total number of bits of feedbackresponse information to be transmitted according to the maximumtransmission delay.

The transceiver unit 402 is configured to transmit to the network devicethe feedback response information to be transmitted with the totalnumber of bits.

In an implementation, the processing unit 401 is specifically configuredto: determine the total number of bits of the feedback responseinformation to be transmitted according to the maximum transmissiondelay and a minimum transmission delay.

In an implementation, the processing unit 401 is specifically configuredto: determine the total number of bits of the feedback responseinformation to be transmitted according to a difference between themaximum transmission delay and the minimum transmission delay.

In an implementation, the processing unit 401 is specifically configuredto: determine the total number of bits of the feedback responseinformation to be transmitted according to the maximum transmissiondelay, the minimum transmission delay and M_(non-DL), here, M_(non-DL)is a value less than the maximum transmission delay.

In an implementation, the processing unit 401 is specifically configuredto: determine the total number of bits of the feedback responseinformation to be transmitted according to a value obtained bysubtracting the minimum transmission delay and M_(non-DL) from themaximum transmission delay, here, M_(non-DL) is a value less than themaximum transmission delay.

In an implementation, the processing unit 401 is specifically configuredto determine the total number of bits of the feedback responseinformation to be transmitted according to the maximum transmissiondelay, the total number of bits N=C*(T_(max)−T_(min)).

Here, T_(max) is the maximum transmission delay, T_(min) is anonnegative integer less than T_(max), and C is a positive integer.

In an implementation, the processing unit 401 is specifically configuredto determine the total number of bits of the feedback responseinformation to be transmitted according to the maximum transmissiondelay, the total number of bits N=C*(T_(max)−T_(min)−M_(non-DL)).

Here, T_(max) is the maximum transmission delay, T_(min) and M_(non-DL)are each a nonnegative integer less than T_(max), and C is a positiveinteger.

In an implementation, T_(min) is the minimum transmission delay fortransmission of feedback response information by the terminal or T_(min)is a parameter configured by the network device.

In an implementation, M_(non-DL) is the number of all first-type timeunits between a transmission time unit Y−T_(max) and a transmission timeunit Y−T_(min), here, a transmission time unit Y is a time unit fortransmission of the feedback response information to be transmitted.

The first-type time unit includes, but not limited to, one or anycombination of: a UL time unit, a time unit in which no physical sharedchannel is transmitted by the terminal and a time unit in which no DLcontrol signaling is monitored by the terminal.

In an implementation, C may specifically be as follows.

C may be a maximum number of bits of feedback response informationcorresponding to a PDSCH. Or C is a set constant. Or C is a parameterconfigured by the network device.

Specifically, the maximum number of bits of the feedback responseinformation corresponding to the PDSCH may be: a maximum number of TBscarried in the PDSCH; or a maximum number of CB groups carried in thePDSCH.

In an implementation, the transceiver unit 402 is specificallyconfigured to transmit the feedback response information on which ajoint encoding has been performed.

Or the transceiver unit 402 is specifically configured to transmit thefeedback response information through a physical channel.

Referring to FIG. 4A, FIG. 4A illustrates a network device, whichincludes a processing unit 408 and a transceiver 409 connected with theprocessing unit.

The transceiver unit 408 is configured to transmit configurationsignaling to a terminal, here, the configuration signaling includes anindication about a maximum transmission delay for feedback responseinformation.

The processing unit 409 is configured to determine HARQ feedback timingdynamically determined by the terminal and determine a total number ofbits of feedback response information to be transmitted according to themaximum transmission delay.

The transceiver unit 408 is configured to receive from the terminal thefeedback response information to be transmitted with the total number ofbits. In the implementation illustrated in FIG. 4A, a manner forcalculating the total number of bits may refer to descriptions in theimplementation illustrated in FIG. 3C, and will not be elaboratedherein.

An implementation of the disclosure also provides a terminal, asillustrated in FIG. 5, includes one or more processors 501, a memory502, a transceiver 503 and one or more programs 504. The one or moreprograms are stored in the memory 502 and configured to be executed bythe one or more processors 501, and the programs include instructionsconfigured to execute the operations executed by the terminal in themethod provided by the implementation illustrated in FIG. 3 or FIG. 3B.

An implementation of the disclosure also provides a network device, asillustrated in FIG. 5A, includes one or more processors 505, a memory506, a transceiver 507 and one or more programs 508. The one or moreprograms are stored in the memory 506 and configured to be executed bythe one or more processors 505, and the programs include instructionsconfigured to execute the operations executed by the network device inthe method provided by the implementation illustrated in FIG. 3C or FIG.3B.

The processor may be a processor or a controller, for example, a CentralProcessing unit (CPU), a Digital Signal Processor (DSP), an ApplicationSpecific Integrated Circuit (ASIC), a Field Programmable Gate Array(FPGA) or another programmable logical device, transistor logicaldevice, hardware component or any combination thereof. The processor mayimplement or execute various exemplary logical blocks, modules andcircuits described in combination with the contents disclosed in thedisclosure. The processor may also be a combination realizing acalculation function, for example, including a combination of one ormore microprocessors and a combination of a DSP and a microprocessor.The transceiver 503 may be a communication interface or an antenna.

An implementation of the disclosure also provides a computer-readablestorage medium, which stores a computer program for electronic dataexchange, here, the computer program enables a computer to execute themethod executed by the terminal in the implementation illustrated inFIG. 3 or FIG. 3B. Of course, the computer program enables the computerto execute the method executed by the network device in theimplementation illustrated in FIG. 3C or FIG. 3B.

An implementation of the disclosure also provides a computer programproduct. The computer program product includes a non-transitorycomputer-readable storage medium storing a computer program. Thecomputer program may be operable to enable a computer to execute themethod executed by the terminal in the implementation illustrated inFIG. 3 or FIG. 3B. Of course, the computer program enables the computerto execute the method executed by the network device in theimplementation illustrated in FIG. 3C or FIG. 3B.

The solutions of the implementations of the disclosure are introducedmainly from the angle of interactions between various network elements.It can be understood that for realizing the functions, the terminal andthe network device include corresponding hardware structures and/orsoftware modules executing each function. Those skilled in the art mayeasily realize that the units and algorithm operations of each exampledescribed in combination with the implementations disclosed in thedisclosure may be implemented by hardware or a combination of thehardware and computer software in the disclosure. Whether a certainfunction is executed by the hardware or in a manner of driving thehardware by the computer software depends on specific applications anddesign constraints of the technical solutions. Professionals may realizethe described functions for each specific application by use ofdifferent methods, but such realization shall fall within the scope ofthe disclosure.

According to the implementations of the disclosure, functional units ofthe terminal and the network device may be divided according to theabovementioned method examples. For example, each functional unit may bedivided correspondingly for each function and two or more than twofunctions may also be integrated into a processing unit. The integratedunit may be implemented in a hardware form and may also be implementedin form of software program module. The division of the units in theimplementation of the disclosure is schematic and only is a logicalfunction division and another division manner may be adopted duringpractical implementation.

An implementation of the disclosure also provides another terminal. Asillustrated in FIG. 6, for convenient description, only parts related tothe implementation of the disclosure are illustrated, and specifictechnical details which are undisclosed refer to parts of the method ofthe implementations of the disclosure. The terminal may be any terminaldevice including a mobile phone, a tablet computer, a Personal DigitalAssistant (PDA), a Point of Sales (POS), a vehicle-mounted computer andthe like. For example, the terminal is a mobile phone.

FIG. 6 is a block diagram of part structure of a mobile phone related toa terminal according to an implementation of the disclosure. Referringto FIG. 6, the mobile phone includes components such as a RadioFrequency (RF) circuit 910, a memory 920, an input unit 930, a displayunit 940, a sensor 950, an audio circuit 960, a Wireless Fidelity (WiFi)module 970, a processor 980 and a power supply 990. Those skilled in theart should know that the structure of the mobile phone illustrated inFIG. 6 is not intended to limit the mobile phone and may includecomponents more or fewer than those illustrated in the figure or somecomponents are combined or different component arrangements are adopted.

Each component of the mobile phone will be specifically introduced belowin combination with FIG. 6.

The RF circuit 910 may be configured to receive and send information.The RF circuit 910 usually includes, but not limited to, an antenna, atleast one amplifier, a transceiver, a coupler, a Low Noise Amplifier(LNA), a duplexer and the like. In addition, the RF circuit 910 may alsocommunicate with a network and another device through wirelesscommunication. Any communication standard or protocol may be adopted forwireless communication, including, but not limited to, a Global Systemof Mobile communication (GSM), a General Packet Radio Service (GPRS),Code Division Multiple Access (CDMA), Wideband Code Division MultipleAccess (WCDMA), Long Term Evolution (LTE), an electronic mail, ShortMessaging Service (SMS) and the like.

The memory 920 may be configured to store a software program and amodule. The processor 980 runs the software program and module stored inthe memory 920, thereby executing various function applications and dataprocessing of the mobile phone. The memory 920 may mainly include aprogram storage region and a data storage region. The program storageregion may store an operating system, an application program required byat least one function and the like. The data storage region may storedata created according to use of the mobile phone and the like. Inaddition, the memory 920 may include a high-speed Random Access Memory(RAM) and may further include a nonvolatile memory, for example, atleast one disk storage device, flash memory device or other volatilesolid-state storage device.

The input unit 930 may be configured to receive input digital orcharacter information and generate key signal input related to usersetting and function control of the mobile phone. Specifically, theinput unit 930 may include a fingerprint recognition module 931 andother input device 932. The fingerprint recognition module 931 mayacquire fingerprint data of a user thereon. In addition to thefingerprint recognition module 931, the input unit 930 may furtherinclude the other input device 932. Specifically, the other input device932 may include, but not limited to, one or more of: a touch screen, aphysical keyboard, a function key (for example, a volume control buttonand a switch button), a trackball, a mouse, a stick and the like.

The display unit 940 may be configured to display information input bythe user or information provided for the user and various menus of themobile phone. The display unit 940 may include a display screen 941. Inan implementation, the display screen 941 may be configured in form ofLiquid Crystal Display (LCD) and Organic Light-Emitting Diode (OLED). InFIG. 6, the fingerprint recognition module 931 and the display screen941 realize input and output functions of the mobile phone as twoindependent components. However, in some implementations, thefingerprint recognition module 931 and the display screen 941 may beintegrated to realize the input and play functions of the mobile phone.

The mobile phone may further include at least one sensor 950, forexample, a light sensor, a motion sensor and another sensor.Specifically, the light sensor may include an environmental light sensorand a proximity sensor. The environmental light sensor may regulatebrightness of the display screen 941 according to brightness ofenvironmental light, and the proximity sensor may turn off the displayscreen 941 and/or backlight when the mobile phone is moved to an ear. Anaccelerometer sensor as a motion sensor may detect a magnitude of anacceleration in each direction (usually three axes), may detect amagnitude and direction of the gravity under a static condition, and maybe configured for an application recognizing a posture of the mobilephone (for example, landscape and portrait switching, a related game andmagnetometer posture calibration), a function related to vibrationrecognition and the like (for example, a pedometer and knocking). Othersensors, for example, a gyroscope, a barometer, a hygrometer, athermometer and an infrared sensor, which may be configured in themobile phone will not be elaborated herein.

The audio circuit 960, a speaker 961, and a microphone 962 may provideaudio interfaces between the user and the mobile phone. The audiocircuit 960 may transmit to the speaker 961 an electric signal obtainedby converting received audio data, and the speaker 961 converts theelectric signal into a sound signal for playing. On the other hand, themicrophone 962 converts a collected sound signal into an electricsignal, the audio circuit 960 receives and converts the electric signalinto audio data, and the audio data is processed by the processor 980and transmitted to, for example, another mobile phone through the RFcircuit 910, or the audio data is played to the memory 920 for furtherprocessing.

WiFi is a short-distance wireless transmission technology. The mobilephone may help the user through the WiFi module 970 to receive and sendan electronic mail, browse a webpage, access streaming media and thelike, and wireless wideband Internet access is provided for the user.Although the WiFi module 970 is illustrated in FIG. 6, it can beunderstood that it is not a necessary composition of the mobile phoneand may completely be omitted according to a requirement withoutchanging the scope of the essence of the disclosure.

The processor 980 is a control center of the mobile phone, connects eachpart of the whole mobile phone by use of various interfaces and linesand executes various functions and data processing of the mobile phoneby running or executing the software program and/or module stored in thememory 920 and calling data stored in the memory 920, thereby monitoringthe whole mobile phone. In an implementation, the processor 980 mayinclude one or more processing units. The processor 980 may integrate anapplication processor and a modulation and demodulation processor. Theapplication processor mainly processes the operating system, a userinterface, an application program and the like. The modulation anddemodulation processor mainly processes wireless communication. It canbe understood that the modulation and demodulation processor may alsonot be integrated into the processor 980.

The mobile phone further includes the power supply 990 (e.g., battery)supplying power to each part. The power supply may be logicallyconnected with the processor 980 through a power management system,thereby realizing functions of charging and discharging management,power consumption management and the like through the power managementsystem.

Although not illustrated in the figure, the mobile phone may furtherinclude a camera, a Bluetooth module and the like, which will not beelaborated herein.

In the implementation illustrated in FIG. 3 or FIG. 3B, the flow on aterminal side in each operation of the method may be implemented on thebasis of the structure of the mobile phone.

In the implementation illustrated in FIG. 4 or FIG. 5, each functionalunit may be implemented on the basis of the structure of the mobilephone.

The operations of the method or algorithm described in theimplementations of the disclosure may be implemented in a hardwaremanner, and may also be implemented in a manner of executing, by aprocessor, software. A software instruction may consist of acorresponding software module, and the software module may be stored ina RAM, a flash memory, a Read Only Memory (ROM), an ErasableProgrammable ROM (EPROM), an Electrically EPROM (EEPROM), a register, ahard disk, a mobile hard disk, a Compact Disc-ROM (CD-ROM) or a storagemedium in any other form well known in the field. An exemplary storagemedium is coupled to the processor, thereby enabling the processor toread information from the storage medium and write information into thestorage medium. Of course, the storage medium may also be a component ofthe processor. The processor and the storage medium may be located in anASIC. In addition, the ASIC may be located in an access network device,a target network device or a core network device. Of course, theprocessor and the storage medium may also exist in the access networkdevice, the target network device or the core network device as discretecomponents.

Those skilled in the art may realize that in one or more abovementionedexamples, all or part of the functions described in the implementationsof the disclosure may be realized through software, hardware or anycombination thereof. During implementation with the software, theimplementations may be implemented completely or partially in form ofcomputer program product. The computer program product includes one ormore computer instructions. When the computer program instruction isloaded and executed on a computer, the flows or functions according tothe implementations of the disclosure are completely or partiallygenerated. The computer may be a universal computer, a dedicatedcomputer, a computer network or another programmable device. Thecomputer instruction may be stored in a computer-readable storage mediumor transmitted from a computer-readable storage medium to anothercomputer-readable storage medium. For example, the computer instructionmay be transmitted from a website, computer, server or data center toanother website, computer, server or data center in a wired (forexample, coaxial cable, optical fiber and Digital Subscriber Line (DSL))or wireless (for example, infrared, wireless and microwave) manner. Thecomputer-readable storage medium may be any available medium accessiblefor the computer or may be a data storage device including such as aserver and a data center integrated by one or more available media. Theavailable medium may be a magnetic medium (for example, a floppy disk, ahard disk and a magnetic tape), an optical medium (for example, aDigital Video Disc (DVD)), a semiconductor medium (for example, a SolidState Disk (SSD)) or the like.

The abovementioned specific implementation modes further describe thepurposes, technical solutions and beneficial effects of theimplementations of the disclosure in detail. It is to be understood thatthe above is only the specific implementation mode of theimplementations of the disclosure and not intended to limit the scope ofprotection of the implementations of the disclosure. Any modifications,equivalent replacements, improvements and the like made on the basis ofthe technical solutions of the implementations of the disclosure shallfall within the scope of protection of the implementations of thedisclosure.

1.-42. (canceled)
 43. A method for determining feedback responseinformation, comprising: determining, by a terminal, feedback responseinformation transmitted in a third time unit, according to a first timeunit, a second time unit and a number of first-type time units, whereina sum of an index of the first time unit and a number of time unitscorresponding to a maximum transmission delay is equal to an index ofthe third time unit, a sum of an index of the second time unit and anumber of time units corresponding to a minimum transmission delay isequal to the index of the third time unit, and the first-type time unitis a time unit, not used for physical downlink shared channel (PDSCH)transmission, between the first time unit and the second time unit. 44.The method of claim 43, wherein the feedback response informationexcludes a bit corresponding to the first-type time unit.
 45. The methodof claim 43, wherein the index of the third time unit is equal to a sumof an index of a time unit in which feedback timing indicationinformation is transmitted and a feedback timing value indicated by thefeedback timing indication information.
 46. The method of claim 43,wherein the first time unit, the second time unit and the third timeunit are all slots.
 47. The method of claim 43, wherein the maximumtransmission delay is a maximum time interval between a time unit inwhich downlink data is transmitted and a time unit in which feedbackresponse information for the downlink data is transmitted, and theminimum transmission delay is a minimum time interval between a timeunit in which downlink data is transmitted and a time unit in whichfeedback response information for the downlink data is transmitted. 48.A method for determining feedback response information, comprising:determining, by a network device, feedback response informationtransmitted in a third time unit, according to a first time unit, asecond time unit and a number of first-type time units, wherein a sum ofan index of the first time unit and a number of time units correspondingto a maximum transmission delay is equal to an index of the third timeunit, a sum of an index of the second time unit and a number of timeunits corresponding to a minimum transmission delay is equal to theindex of the third time unit, and the first-type time unit is a timeunit, not used for physical downlink shared channel (PDSCH)transmission, between the first time unit and the second time unit. 49.The method of claim 48, wherein the feedback response informationexcludes a bit corresponding to the first-type time unit.
 50. The methodof claim 48, wherein the index of the third time unit is equal to a sumof an index of a time unit in which feedback timing indicationinformation is transmitted and a feedback timing value indicated by thefeedback timing indication information.
 51. The method of claim 48,wherein the first time unit, the second time unit and the third timeunit are all slots.
 52. The method of claim 48, wherein the maximumtransmission delay is a maximum time interval between a time unit inwhich downlink data is transmitted and a time unit in which feedbackresponse information for the downlink data is transmitted, and theminimum transmission delay is a minimum time interval between a timeunit in which downlink data is transmitted and a time unit in whichfeedback response information for the downlink data is transmitted. 53.A device for determining feedback response information, comprising: aprocessor; and a memory, configured to store one or more programinstructions that, when executed by the processor, cause the processorto determine feedback response information transmitted in a third timeunit, according to a first time unit, a second time unit and a number offirst-type time units, wherein a sum of an index of the first time unitand a number of time units corresponding to a maximum transmission delayis equal to an index of the third time unit, a sum of an index of thesecond time unit and a number of time units corresponding to a minimumtransmission delay is equal to the index of the third time unit, and thefirst-type time unit is a time unit, not used for physical downlinkshared channel (PDSCH) transmission, between the first time unit and thesecond time unit.
 54. The device of claim 53, wherein the feedbackresponse information excludes a bit corresponding to the first-type timeunit.
 55. The device of claim 53, wherein the index of the third timeunit is a sum of an index of a time unit in which feedback timingindication information is transmitted and a feedback timing valueindicated by the feedback timing indication information.
 56. Theterminal of claim 53, wherein the first time unit, the second time unitand the third time unit are all slots.
 57. The device of claim 53,wherein the maximum transmission delay is a maximum time intervalbetween a time unit in which downlink data is transmitted and a timeunit in which feedback response information for the downlink data istransmitted, and the minimum transmission delay is a minimum timeinterval between a time unit in which downlink data is transmitted and atime unit in which feedback response information for the downlink datais transmitted.